CN101871190B - Method for manufacturing plant fiber injection molded product - Google Patents
Method for manufacturing plant fiber injection molded product Download PDFInfo
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- CN101871190B CN101871190B CN201010167454XA CN201010167454A CN101871190B CN 101871190 B CN101871190 B CN 101871190B CN 201010167454X A CN201010167454X A CN 201010167454XA CN 201010167454 A CN201010167454 A CN 201010167454A CN 101871190 B CN101871190 B CN 101871190B
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Abstract
The invention relates to a method for manufacturing a plant fiber injection molded product. The method comprises the following steps of: preparing a plant fiber mixture, wherein the plant fiber mixture is a thermosetting plant fiber mixture; delivering the plant fiber mixture to an injection nozzle by using a feeder, wherein the temperature of the feeder and the injection nozzle is less than or equal to 58 DEG C; then injecting and filling the mixture into a mould cavity of a molding mould, wherein the mould cavity is defined and formed by a mould wall; and finally heating the mixture and curing the mixture to form the injection molded product by heating the mould wall, wherein the temperature of the mould wall is set to be between 90 and 180 DEG C. In the method, the step of heating can be performed when the mixture is injected into the molding mould, and a heat-setting approach is adopted by matching the features of the plant fiber mixture, so the molded product can be taken out at a high temperature to shorten the occupied time of the mould; and besides, as the main raw materials are plant fibers, the method for manufacturing the plant fiber injection molded product has the advantages of environmental protection, energy conservation, high processing efficiency and low cost.
Description
Technical field
The invention relates to a kind of forming method of string, be meant that especially a kind of string that uses is as raw material and be made into the manufacture method of plant fiber injection molded product of the product of predetermined pattern with injection molding method.
Background technology
Existing ejection formation goods, its main raw material source is plastic raw materials or rubber raw materials, yet plastic raw materials or rubber raw materials are difficult for by microbial decomposition in natural environment or landfill, rot, in the burning incineration course, can produce a large amount of dense smokes and toxic gas again, cause the pollution on the various environment such as air, soil, water source, and become the problem in the environmental protection.
In addition, the manufacture method of the ejection formed piece of existing plastic material, when batch mixing and ejaculation, all need to utilize high temperature to make plastic raw materials maintain molten condition, so that shoot material in a molding tool, this plastic raw materials just can make an ejection formed piece behind the cooling and shaping gradually in this mould, mould batch mixing fusion fully in order to make, all to continue the plastic raw materials heating and will remain on high temperature more than 200 ℃ at batch mixer and ejaculator, in formation mould, must wait until then that the moulding product are finalized the design fully and are cooled to predetermined temperature and could take out after following, in order to avoid goods softening transform, make each goods need long manufacturing time relatively, therefore, the not only more not environmental protection of material of ejection formed piece of existing plastic material, on making, also waste energy and processing procedure efficient lower.
In order to solve the problem of not environmental protection of material, be raw material though also there is the part daily living article to change with timber or paper pulp, the manufacture method of existing timber and paper pulp except still must cutting down forest, also can be discharged a large amount of papermaking wastewaters, still can heavy damage to environment.
In addition, for in response to the environmental protection demand, also have with the string is the product of raw material, but the manufacturing of this series products all is with the hot pressing mode moulding, the major defect of hot-press molding method is the product that pan feeding was not easy evenly and can't molds special construction and shape, must secondary or procedure repeatedly as the product that will make custom design, and have cost height, the inefficient shortcoming of processing procedure.
In view of this, at present except still need be devoted to develop various natural agricultural wastes as the raw material of various life goods with the conservation cost, in order further to promote Related product quality, increase product form diversification and to improve and make efficient, still have the demand that continues exploitation and improve manufacture method.
Summary of the invention
Therefore, purpose of the present invention, be to provide a kind of finished product that is fit to natural agricultural wastes are made specific moulding with the solution environmental issue, and the manufacture method that can improve Forming Quality, reduce the product deformation rate and promote the plant fiber injection molded product of making efficient.
So the manufacture method of plant fiber injection molded product of the present invention comprises the following step:
One, preparation one string batch mixing, this string batch mixing comprises a major ingredient component, a sizing material component and an additive component of mixing mutually according to predetermined ratio, and the moisture content of this string batch mixing is to be controlled at 30～50wt%, the string material that this major ingredient component is the particle shape, this sizing material component is one to be selected from the sizing material that is made of in the group following: latex, pectin, protein adhesive, phenolic resin glue, urea-formaldehyde resin adhesive, and the combination of described sizing material, this additive component comprises cornstarch, sulfate, stearic acid and the water that mixes mutually according to predetermined ratio;
Two, the string batch mixing that utilizes a feeder to have mixed is delivered to the shower nozzle place that shoots material and shoots material, this string batch mixing is to advance towards this shower nozzle that shoots material via the mode of feeding pressurization and screw press in regular turn in this feeder inside, and the inner temperature with the shower nozzle that shoots material of this feeder all is set in smaller or equal in 58 ℃ the scope; And
Three, the shower nozzle that shoots material of this feeder penetrates this string batch mixing certainly, with inject and filling in a die cavity of a molding tool, this die cavity is defined by a die wall to form, seeing through this die wall of heating is heated the string batch mixing in this die cavity, and then slaking and be fixed to an ejection formed piece, the temperature of this die wall is to be set in 90 ℃～180 ℃.
Beneficial effect of the present invention is: the characteristic that cooperates the used string batch mixing of the present invention, can just heat in the step that this batch mixing is injected formation mould, other step then can be carried out under lower temperature or normal temperature, in addition, see through this string batch mixing and at high temperature finish the characteristic of typing, the product of can just should finalizing the design when high temperature take out to shorten mould occupied time, and then can promote whole manufacturing efficient and solve the disappearance that thermoforming way is easy to generate higher fraction defective, add that manufacture method of the present invention can be the moulding product that main raw material is made predetermined pattern with the string, and with environmental protection, save the energy and cost and can promote the characteristic of processing procedure efficient.
Description of drawings
Fig. 1 is a flow chart of manufacture method one preferred embodiment of plant fiber injection molded product of the present invention;
Fig. 2 is a schematic diagram, and a forming step of this preferred embodiment is described, utilizes one to shoot material that shower nozzle is injected a die cavity of a molding tool and the situation of filling string batch mixing.
Wherein, 20, the string batch mixing, 2, batch mixer, 3, feeder, 31, shower nozzle shoots material, 32, formation mould, 321, die wall, 322, die cavity, 33, the screw feeding unit, 331, screw assembly, 34, cooling system, 4, vacuum extractor, 5, heating unit, 51, heating tube.
The specific embodiment
About addressing other technology contents, characteristics and effect before the present invention, in the following detailed description that cooperates with reference to one of a graphic preferred embodiment, can clearly present.
Consult Fig. 1 and Fig. 2, the preferred embodiment of the manufacture method of plant fiber injection molded product of the present invention comprises the following step:
Because when mixing, interaction between aforementioned three kinds of components or owing to stir the temperature that action may cause this batch mixing and raise, cause the too early slaking of part batch mixing for fear of temperature is too high, be preferably in this mixed Tu machine 2 and set up a cooling system, so that this major ingredient component, temperature when the sizing material component mixes with additive component are controlled at smaller or equal in 58 ℃ the scope.
Preferably, the major ingredient component of this string batch mixing 20 be one be selected from by following constitute plant the material material in the group: husk class material, straw kind material, waste residue class material, starch based material, and described combination of planting the material material.Wherein, this husk class material is one to be selected from the material that is made of in the group following: rice husk, wheat husk, sorghum husk, peanut shell, beanpod, cocoanut shell, and the combination of described material, this straw material dimension is one to be selected from the material that is made of in the group following: the rice bar, straw, cornstalk, kaoliang stalk, the beans bar, cotton stalk, reed, and the combination of described material, this waste residue class material is one to be selected from the material that is made of in the group following: wood chip, the bamboo bits, the corn ear slag, bagasse, soybean residue, the beer slag, bean dregs, and the combination of described material, and this starch based material is one to be selected from the material that is made of in the group following: cornstarch, dehydrated potato powder, tapioca starch, soy meal, bajiao banana, the taro powder, acorn nut powder, and the combination of described material.The aforementioned material material of planting is the main component in this string batch mixing, because these materials belong to natural agricultural wastes, it is convenient and cheap to obtain, and its kind scope is wide, can select different materials for use according to various places resource situation and season, make the lower and unlikely scarcity of raw material sources of cost of material, the product of being made with this kind raw material can decompose at natural environment, and can meet the demand of environmental protection.
The moulding product of making in order to make have the structural strength that meets practical specification, must control the mixed proportion of this major ingredient component, sizing material component and additive component, preferably, this string batch mixing 20 comprises the major ingredient component of 45～75wt%, the sizing material component of 10～35wt% and the additive component of 15～25wt%.In the present embodiment, this string batch mixing 20 is to be formed by the major ingredient component of 70wt%, the sizing material component of 10wt% and the additive component mixed preparing of 20wt%.
Wherein, add this sizing material component and this sizing material component is evenly mixed with this major ingredient component, the characteristic that can see through this sizing material component is combined into one this major ingredient component, cooperates predetermined processing and forming method again, just can be made into the infrastructure product of predetermined pattern.This additive component then is the surface quality that is used to improve the moulding product, and can make the moulding product of being made have smooth careful surface, and helps to promote the yield and quality sense.
In addition, because if the particle diameter that forms the particle shape string material in this major ingredient component is excessive, to cause this major ingredient component mobile relatively poor in this sizing material component, and generation agglomeration, by this, product structure intensity and rerum natura variation that this string batch mixing 20 is made, and have influence on practicality, otherwise, if the particle diameter specification of this string material is too small, then carry out processed, increase manufacturing cost on the contrary, therefore because of need costs more time and program, in order between product rerum natura and manufacturing cost, to average out, through the actual result who studies, when with the international standard sieve mesh when measuring standard, the string material of this major ingredient component is preferably between control 60 orders～120 orders through the particle size range after the milled processed and is advisable.
What deserves to be explained is, all contain moisture in this major ingredient component, sizing material component and the additive component, therefore, the string batch mixing that aforementioned three kinds of components mixing back is obtained also has predetermined moisture content, the moisture content of this string batch mixing is to be controlled at 30～50wt%, by this, it is mobile to reach mixed uniformly effect and to help to keep the smoothness of feeding this string batch mixing to be had.
Preferably, in order to make this string batch mixing 20 evenly and fully fill up this die cavity 322, and the ejection formed piece of acquisition high precision and preferable Forming Quality, one vacuum extractor 4 that is connected with this die cavity 322 can be set, and when this string batch mixing 20 shoots material, utilize 4 pairs of these die cavitys 322 of this vacuum extractor to vacuumize, by this, help to make this batch mixing 20 to fill up this die cavity 322 fast and equably, and can quicken eliminating hot gas, lifting shaping speed, therefore, can stabilized product quality and the generation of minimizing fraction defective.
Though this string batch mixing has the characteristic of meeting slaking typing when being heated, except need are finished the manufacturing of these typing product by heating, also to avoid too high temperature cause wherein plant that the material material burns and heating source consumes too much and wastes energy, therefore, the temperature that is preferably this die wall 321 is set in 90 ℃～180 ℃.
Wherein, one heating unit 5 can be set so that this die wall 321 is heated and maintains predetermined temperature along the die wall 321 of this formation mould 32, the set-up mode of this heating unit 5 is not limited, for example, this heating unit 5 can be by bury most heating tubes 51 underground in this die wall 321, in these heating tubes 51, introduce heating source again, reach the effect of this die wall 321 of heating, used heating source kind is not limited, can see through a heating source that is selected from the following group this die wall 321 is heated: electric heating, steam and hot coal oil.
What need supplementary notes is, the kind of these moulding product and pattern are not limited, can be according to the shape of production Demand Design die cavity 322, and then make the moulding product of material environmental protection ad hoc structure pattern with practical value again, for example, these moulding product can be environment-protective fence plate, environment protecting tableware, various environment protection container and industrial products.In addition, in the present embodiment, though be to be the example explanation with vertical formation mould 32, but the used equipment of manufacture method of the present invention can change its configuration mode according to actual demand, the discharging direction of this shower nozzle 31 that shoots material also can be adjusted, and therefore, the present invention also can be applicable to horizontal formation mould 32.
Conclude above-mentionedly, the manufacture method of plant fiber injection molded product of the present invention can be obtained following effect and advantage, so can reach purpose of the present invention:
One, the present invention is only when shooting material to this formation mould 32, just need heating that batch mixing 20 slakings in this die cavity 322 are finalized the design, at batch mixer 2, neither need heated again when feeder 3 carried out batch mixing and feeding, all to provide up to the high temperature more than 200 ℃ when batch mixing and the feeding compared to existing ejection formation method for making, just can make plastics keep the practice of fluid state, the present invention can save a large amount of energy, and helps to reduce manufacturing cost.
Two, cooperate this string batch mixing 20 to be subjected to the material characteristic of HEAT SETTING, just can make these batch mixing 20 slakings and be fixed to this moulding product these formation mould 32 heating, must wait until that in order to prevent distortion these goods are cooled to could finalize the design below the uniform temperature with existing general thermoplastic articles, and need treat that the practice that a period of time could take out compares, after being heated, batch mixing of the present invention just can be fixed to the moulding product, therefore need not wait until just taking-up of cooling, even directly take out also unlikely this moulding product distortion that causes in the condition of high temperature, by this, can effectively shorten 32 occupied times of this formation mould, and can continue to make the present invention have the advantage that can improve overall process efficient for the use that shoots material next time.
Three, batch mixing of the present invention can obtain stable typing by the control heating-up temperature, compared to being cooled to below the uniform temperature and keeping the existing injection molding method that a period of time could obtain stable typing, the situation of more difficult generation moulding product distortion, make the present invention be easier to guarantee the typing quality of moulding product, and can effectively reduce fraction defective and deformation rate.
Four, the existing manufacture of making plant-fiber product with hot-press molding method, be subject to molding mode, can only be applicable to the better simply product of manufacturing structure and shape, the present invention can utilize the advantage of ejection formation method for making, cooperates the mould design and makes different structure and different product, therefore, can cooperate the production demand, make the product of shape diversification, and can see through the mould design equally, improve the precision of moulding product, and help to produce high-quality environmental-protecting material goods.
Five, the practical moulding product because the present invention can make ad hoc structure with plant fiber material owing to the raw material environmental protection, obtain and reach cheaply easily, can reduce manufacturing cost equally, and the present invention are had meet the characteristic of environmental protection.
The above person of thought, only for the present invention's preferred embodiment, when the scope that can not limit the invention process with this, promptly the simple equivalent of being done according to the present patent application claim and invention description content generally changes and modifies, and all still belongs in the scope that patent of the present invention contains.
Claims (9)
1. the manufacture method of a plant fiber injection molded product comprises the following step:
One, preparation one string batch mixing, this string batch mixing comprises a major ingredient component, a sizing material component and an additive component of mixing mutually according to predetermined ratio, and the moisture content of this string batch mixing is to be controlled at 30～50wt%, the string material that this major ingredient component is the particle shape, this sizing material component is one to be selected from the sizing material that is made of in the group following: latex, pectin, protein adhesive, phenolic resin glue, urea-formaldehyde resin adhesive, and the combination of described sizing material, this additive component comprises cornstarch, sulfate, stearic acid and the water that mixes mutually according to predetermined ratio;
Two, the string batch mixing that utilizes a feeder to have mixed is delivered to the shower nozzle place that shoots material and shoots material, this string batch mixing is to advance towards this shower nozzle that shoots material via the mode of feeding pressurization and screw press in regular turn in this feeder inside, and the inner temperature with the shower nozzle that shoots material of this feeder all is set in smaller or equal in 58 ℃ the scope; And
Three, the shower nozzle that shoots material of this feeder penetrates this string batch mixing certainly, with inject and filling in a die cavity of a molding tool, this die cavity is defined by a die wall to form, seeing through this die wall of heating is heated the string batch mixing in this die cavity, and then slaking and be fixed to an ejection formed piece, the temperature of this die wall is to be set in 90 ℃～180 ℃.
2. the manufacture method of plant fiber injection molded product according to claim 1 is characterized in that: in step 3, be that the die cavity to this formation mould vacuumizes when shooting material, so that this string batch mixing evenly and fully fills up this die cavity.
3. the manufacture method of plant fiber injection molded product according to claim 2, it is characterized in that: in step 3, be that die wall along this formation mould is provided with a heating unit and makes this die wall maintain predetermined temperature, and this heating unit is to see through one to be selected from heating source in the following group to this die wall heating: electric heating, steam and hot coal oil.
4. the manufacture method of plant fiber injection molded product according to claim 2, it is characterized in that: wherein, in step 1, the major ingredient component of this string batch mixing is selected from by following by one and is constituted group: husk class material, straw kind material, waste residue class material, starch based material, and their combination.
5. the manufacture method of plant fiber injection molded product according to claim 4, it is characterized in that: wherein, this husk class material is selected from by following by one and is constituted group: rice husk, wheat husk, sorghum husk, peanut shell, beanpod, cocoanut shell, and their combination, this straw kind material dimension is selected from by following by one and is constituted group: the rice bar, straw, cornstalk, sorghum rod, the beans bar, cotton stalk, reed, and their combination, this waste residue class material is selected from by following by one and is constituted group: wood chip, the bamboo bits, beautiful wooden stick slag, bagasse, soybean residue, the beer slag, bean dregs, and their combination, and this starch based material is selected from by following by one and is constituted group: cornstarch, dehydrated potato powder, tapioca starch, soy meal, bajiao banana, the taro powder, acorn nut powder, and their combination.
6. the manufacture method of plant fiber injection molded product according to claim 1 or 5, it is characterized in that: wherein, in step 1, this string batch mixing comprises the major ingredient component of 45～70wt%, the sizing material component of 10～35wt% and the additive component of 15～25wt%.
7. the manufacture method of plant fiber injection molded product according to claim 1 or 5, it is characterized in that: wherein, in step 1, when the particle diameter of the string material of this major ingredient component defined according to the international standard sieve mesh, its particle size range was 60 orders-120 orders.
8. the manufacture method of plant fiber injection molded product according to claim 1, it is characterized in that: wherein, in step 3, be that die wall along this formation mould is provided with a heating unit and makes this die wall maintain predetermined temperature, and this heating unit is to see through one to be selected from heating source in the following group to this die wall heating: electric heating, steam and hot coal oil.
9. the manufacture method of plant fiber injection molded product according to claim 1, it is characterized in that: wherein, in step 3, this string batch mixing is 100～3500 tons from the pressure that the shower nozzle that shoots material penetrates, and the molding time of this batch mixing in this formation mould is 1 minute～15 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010167454XA CN101871190B (en) | 2010-04-19 | 2010-04-19 | Method for manufacturing plant fiber injection molded product |
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| CN201010167454XA CN101871190B (en) | 2010-04-19 | 2010-04-19 | Method for manufacturing plant fiber injection molded product |
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| CN101871190A CN101871190A (en) | 2010-10-27 |
| CN101871190B true CN101871190B (en) | 2011-09-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104610771A (en) * | 2015-02-27 | 2015-05-13 | 杨国桢 | Plant fiber injection molding product, and manufacturing method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8389110B2 (en) * | 2011-02-01 | 2013-03-05 | Hsien-Cheng Liu | Compositions for preparing plant fiber composites and plant fiber composites prepared from the same |
| CN109208118B (en) * | 2018-09-27 | 2021-11-19 | 临邑禹王植物蛋白有限公司 | Production method for producing disposable hanging rope by using soybean fibers |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH11507543A (en) * | 1995-06-14 | 1999-07-06 | フランツ・ハース・ヴァッフェルマシイネン・インドウストリーゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Manufacturing method of corrosive thin molded body |
| CN1243899A (en) * | 1998-08-03 | 2000-02-09 | 李景河 | Squeezing, puffing and shaping technology for making dinner set and package filler with plant fibres |
| CN1122690C (en) * | 2000-09-26 | 2003-10-01 | 俞锋 | Degradable disposable dinner (beverage) containers of plant fibre and its preparing process |
| CN1177102C (en) * | 2001-12-28 | 2004-11-24 | 中国科学院广州化学研究所 | Paper pulp fibre composite moulding-forming equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104610771A (en) * | 2015-02-27 | 2015-05-13 | 杨国桢 | Plant fiber injection molding product, and manufacturing method and application thereof |
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